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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Rapid Commun Mass Spectrom. 2009 Feb;23(3):409–418. doi: 10.1002/rcm.3894

Figure 4.

Figure 4

a.) Insulin positive nano-ESI mass spectrum b.) PFO negative negative nano-ESI mass spectrum. c.) Post-ion/ion reaction data for the insulin ions stored in Q0 with transmission of PFO anions. d.) Single frequency on resonance (SFOR) ion parking of the insulin +4 charge state during the charge reduction of insulin in Q0 via ion/ion reaction with PFO anions.